water parsnip

English Thesaurus

1. stout white-flowered perennial found wild in shallow fresh water; northern United States and Asia (noun.plant)

hypernym	:	bog plant, marsh plant, swamp plant,
definition	:	a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath (noun.plant)

member meronym	:	genus sium, sium,
definition	:	perennial of wet and marshy places in the northern hemisphere: water parsnips (noun.plant)